ci: Only install OS dependencies for act

Github CI already has these packages installed, so we don't need to install
them. However, the smaller images provided by act don't have these
installed.

Signed-off-by: Sean Anderson <[email protected]>

.github/workflows/python.yml

@@ -8,6 +8,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      - name: Install OS dependencies
+        if: ${{ env.ACT }}
+        run: |
+          sudo mkdir -p /etc/postgresql-common/createcluster.d/
+          echo "create_main_cluster = false" | \
+            sudo tee /etc/postgresql-common/createcluster.d/override.conf
+          sudo apt-get update
+          sudo apt-get install -y python3-dev postgresql
       - name: Get pip cache dir
         id: pip-cache
         run: |
@@ -19,13 +27,8 @@ jobs:
           key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt', 'requirements_test.txt') }}
           restore-keys: |
             ${{ runner.os }}-pip-
-      - name: Install dependencies
+      - name: Install python dependencies
         run: |
           echo "$HOME/.local/bin" >> $GITHUB_PATH
-          sudo mkdir -p /etc/postgresql-common/createcluster.d/
-          echo "create_main_cluster = false" | \
-            sudo tee /etc/postgresql-common/createcluster.d/override.conf
-          sudo apt-get update
-          sudo apt-get install -y python3-dev postgresql
           pip install -r requirements.txt -r requirements_test.txt
       - run: pytest